Foldable knife



FIG. 1 is a front elevational view of a foldable knife in a folded position embodying my design;

FIG. 2 is a rear elevational review thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a front elevational view of my invention in an unfolded position.

The dashed lined icon in FIGS. 1, 2 and 7 form no part of the claimed design. 

The ornamental design for a foldable knife, as shown and described. 